Regex Tester
Regex tester with match highlighting, group details, and replacement preview.
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Preview updates automatically
FlagsCurrent: gm
Test Text0 chars · 0 words · 0 lines
Matches: 0Groups: 0Named: 0
Highlight PreviewMatches highlighted
No content
Replacement Preview
Match DetailsPositions as line:column
No matches found
About This Tool
The Regex Tester provides a complete regex debugging experience for developers and content teams. Configure common flags (g/i/m/s/u/y), inspect match counts, capture groups, and named groups, and visualize hits through highlighted previews. Replacement preview supports group references like $1 to validate replacement logic. All operations run locally with no data uploads.
Features
- 🎯 Flag Controls: Supports g/i/m/s/u/y for professional testing
- ✨ Match Highlight: Instantly highlight matched segments
- 🧩 Group Details: Inspect capture and named group results
- 🔁 Replacement Preview: Validate $1-style replacements in real time
- 📊 Quick Stats: Match and group counts at a glance
- 🛡️ Local Processing: All data stays in your browser